1 Introduction

The GNU Fortran compiler front end was designed initially as a free replacement for, or alternative to, the Unix f95 command; gfortran is the command you will use to invoke the compiler.

• About GNU Fortran: What you should know about the GNU Fortran compiler.
• GNU Fortran and GCC: You can compile Fortran, C, or other programs.
• Preprocessing and conditional compilation: The Fortran preprocessor
• GNU Fortran and G77: Why we chose to start from scratch.
• Project Status: Status of GNU Fortran, roadmap, proposed extensions.
• Standards: Standards supported by GNU Fortran.